Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 261152
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
452 AM PDT TUE MAY 26 2015

*** AIR DISPERSION CATEGORIES:   GOOD, FAIR, POOR ***

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 6-10 MPH.        W-NW 7-10 MPH.
TRANSPORT WINDS               SW 6-10 MPH.        W 3-5 MPH.
MIXING HEIGHT                 2000 FT MSL.        9000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR WED MAY 27        POOR.

VENTILATION INDEX (CATEGORY)  51 (POOR).          270 (POOR).
OUTLOOK FOR WED MAY 27        219 (POOR).

FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W-NW 5-7 MPH.       NE-E 3-6 MPH.
TRANSPORT WINDS               W-NW 5-7 MPH.       W-NW 3-4 MPH.
MIXING HEIGHT                 2000 FT MSL.        9500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR WED MAY 27        POOR.

VENTILATION INDEX (CATEGORY)  49 (POOR).          239 (POOR).
OUTLOOK FOR WED MAY 27        247 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 3-7 MPH.         NW 4-9 MPH.
TRANSPORT WINDS               NW 4-8 MPH.         NW 4-6 MPH.
MIXING HEIGHT                 4000 FT MSL.        10000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR WED MAY 27        GOOD.

VENTILATION INDEX (CATEGORY)  35 (POOR).          224 (POOR).
OUTLOOK FOR WED MAY 27        278 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      293 (POOR)
ELLENSBURG    353 (FAIR)
GOLDENDALE    193 (POOR)
TRI-CITIES    371 (FAIR)
WALLA WALLA   246 (POOR)
YAKIMA        194 (POOR)
BEND          314 (FAIR)
PRINEVILLE    320 (FAIR)
ENTERPRISE    214 (POOR)
HERMISTON     266 (POOR)
JOHN DAY      418 (FAIR)
LA GRANDE     215 (POOR)
MADRAS        276 (POOR)
MEACHAM       209 (POOR)
PENDLETON     235 (POOR)
REDMOND       305 (FAIR)
SENECA        504 (FAIR)
THE DALLES    351 (FAIR)

METEOROLOGICAL INFORMATION PROVIDED IN THIS PRODUCT REPRESENTS ONLY
SOME OF THE FACTORS USED IN BURN DECISIONS.  BURN DECISIONS ARE
OUTSIDE THE PURVIEW OF THE NATIONAL WEATHER SERVICE.

THE VENTILATION INDEX IS A TOOL TO ASSIST SMOKE MANAGEMENT
AGENCIES IN DETERMINING BURN OR NO BURN DECISIONS.  A VENTILATION
INDEX GRAPHIC IS ON THE PENDLETON WEBSITE AT THE FOLLOWING ADDRESS:
HTTP://WWW.WRH.NOAA.GOV/PDT/FORECAST/FWXGRAPHICALVENTILATION.PHP?WFO=PDT

IF YOU WOULD LIKE TO KNOW MORE ABOUT THIS PRODUCT...CONTACT THE
NATIONAL WEATHER SERVICE IN PENDLETON.

$$



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